(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "The manufacture and properties of iron and steel"

THE HISTORY AND SHAPE OF THE TEST-PIECE.
323
TABLE XVI-K.
! Comparative Properties of Rounds of Different Diameters, Bach figure is an average of from 4 to 16 determinations.
Heat No.	Tilt, strength; pounds per square inch.		Elastic limit; pounds per square inch.		Elongation in 8 inches; per cent.		Reduction of area; per cent.	
	Hin.	Kin.	%in.	% in.	Hin.	Kin.	5* in.	Kin.
,    11478 ; • 11489 11660 11684 ,.   11796, i"   11946 12006 <:   12007 • 12610 :      2082 2078	60028 69170  ' 68223 •67888 67080 67456 67550 67948 68774 60670 69772	58215 57671 57707 68078' 67617 66758 65878 67408 56106 56063 66425	40023 87888 80210 89878 88880 88408 88205 88752 80015 89050 80041	30483 87079 87482 88210 88288 87268 86485 87498 87485 •  86810 87007	. 29.52 v 29.81 20.78 . 82.45 80.14 20.81 29.58 80.88 20.80 29.67 80.25	30.68 81.96 80.40 80;75 81.04 80.59 .  80.58 81.44 .81.34 •80:50 82.79	60.5ft 63.45 62.70 66.50 60.45 61.60 60.81 64.13 62.40 64.50 64.90	60.80 62.81 64.10 62.60 68.60 60.60 66,06 61.10 69.45 67.90 68.70
Av.	68582	57156	•38981	87550	80.10	fil.09	62.91	61.83
	.Kin.	%in.	K.in.	Hin.	Kin.	H.in.	.Kin.	&in.
11478 12007 1528 2200	60423 68120 60683 50421	60028 57048 55785 50485	41873 88200 42360 41276	40028 88752 88756 89860	20.44 80.16 80.06 80.00	29.52 30.88 81.66 80.81	65.40 64.55 64.22 64.86	60.66 64.18 66.40 64.65
Av.	50800	58285	40802	89848	29.92	80.47	64.76	68.60
	Kin.	IJfin.	Kin.'	Ifcin.	Kin.	l«in.	%in.	IJ^in.
12884	67820	50818	87770  ,	87298	80.85	82.25	68.15	I 61.55
	%in.	lAin.	Kin.	l&in.	.Km.	l*in.	%in.	l*in.
12868	62683	60480	80085	8657<5	80.60	81.97	62.23	53.80
	.....	l^in.		M in.		1M in.	......	VA in.
,11617		;60683		86770		82.02		54.8 __
in one, the average showing a decrease of 1426 pounds per square inch.
; (£) The elastic limit was lowered in all cases, the average showing a decrease of 1381 pounds per square inch; the elastic, ratio was reduced from 66.5 per cent, to 65.7 per cent. ""(":.(3) The elongation was raised in ten cases and" lowered in one, tlie lavefage showing an increase of 0.99 per cent.
1(4:) The reduction of .area was lowered in seven heats and raised in, four, -fche average showing a decrease of 1.08 per cent.
Comparing the; five-eighth and three-quarter ^nch, it will be found that in the larger' size the following alterations have taken place:      -                      •                                 •                       :; .....4(1) The ultimate strength was lowered in three heats and raised